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  1. Mike Mike

    Do these deck beams look stable to you?

    phameng, I still didn't have time to dig into your links yet (doing real work over here), but came across another dropped beam. this one is probably fine right?
  2. Mike Mike

    What are the limits of prescriptive design?

    lex, Great find on the repeal of the 2006 wall anchorage requirements. Here's a screenshot of the 2006 code: 5" OC!!! quite a difference from 6', no wonder the powers that represent the contractors flipped, here's the movement to squash it: I have no issue with their conclusions. If they have...
  3. Mike Mike

    What are the limits of prescriptive design?

    lex, I can't find any Gnijolli on google, can you send a specific reference? I forgot about R602.3 and after re-reading it I agree with XR's interpretation: "studs shall be continuous ... to... foundation... floor, ceiling or roof diaphragm". I think you and XR are saying the same thing. XR was...
  4. Mike Mike

    What are the limits of prescriptive design?

    lex the photos are from your link Florida disaster preparation hurricane retrofit materials, maybe I clicked something on the site lol. the article explains that you are correct in that the most common failure is in photo 1: the roof ripped off the top of the gable wall and the issue here has...
  5. Mike Mike

    Do these deck beams look stable to you?

    gte and lex, I agree and have typically been requiring simpson ACH caps at a minimum. I just talked to a deck inspector with the county with decades of experience and he said he does require contractors to add bracing for these situations. he said he tells contractors that cap manufacturer...
  6. Mike Mike

    What are the limits of prescriptive design?

    lex great link as usual, basically telling homeowners that yes politicians and special interests screwed you over yet again, sorry maybe I'm too cynical I should reserve judgement. But the way this reads to me is here's a list of shitty things that are going to happen to you and could have been...
  7. Mike Mike

    What are the limits of prescriptive design?

    lex you are correct IRC does require complete load paths, but I'm not sure how it expects non-engineer IRC users to trace loads. I just spent another hour reading thru this and the wood portion is completely silent on ceiling diaphragms, but the cold form portion gives the following guidance...
  8. Mike Mike

    What are the limits of prescriptive design?

    great points lex on adjusting safety factors for the specific limit state and differentiating between life-safety and performance. funny how we use the same handrail safety factors whether it protects against a drop of 1 ft or 1000 ft. RWW, you mentioned the gable wall hinge and it got me to...
  9. Mike Mike

    What are the limits of prescriptive design?

    lex, thanks for the links. I'd like to focus on the ICC committees rather than the local committees. I assume joining the ICC committees is unpaid volunteer effort. I do see ICC is looking for a new CEO and "Government Relations and Operations Associate" on their website, which would certainly...
  10. Mike Mike

    What are the limits of prescriptive design?

    RWW I ran a quick engineering check on three 20' tall 2x6 stud grade kings at the side of a 14' wide opening for 129mph, exp C, 35psf unfactored C&C wind load, 300% overstressed in bending, 5" deflection. Hopefully the homeowner doesn't mind his walls shaking and drywall cracking. no no it's...
  11. Mike Mike

    What are the limits of prescriptive design?

    RWW I believe the max wall height for IRC is 12ft based on 2024 IRC R602.3(6). Jaw droppingly, the king stud schedule does not differentiate between 2x4 and 2x6, at least not that I was able to find. And yes, none of the table entries are even close to working for 12' tall 2x4 stud grade kings...
  12. Mike Mike

    What are the limits of prescriptive design?

    All, here's a summary of key takeaways for anyone who doesn't have time to read the whole thread at this point. let me know if I mischaracterized anything. Items I think we generally agree on: 1. IRC is wildly out of line with other codes and standards, creating house performance issues and in...
  13. Mike Mike

    What are the limits of prescriptive design?

    thanks for the links from Minnesota board lex. definitely tangential to this discussion but very interesting reads none the less. please send more writings from your ideological heroes too! By WABO do you mean Washington Association of Building Officials? The ICC code correlation committee is...
  14. Mike Mike

    Lateral soil spring values for embedded posts or piles

    Eirchech, 15MN/m3 means k4 = 8k/in. here's how you match up to others: ANSI/ASAE EP486.2: 16k/in Braja Das: 2k/in Ronald Scott: 18k/in FixedEarth: 7k/in Joe Bowles: 4k/in (typos above) I don't know of any design charts listing embed stiffness, but I would like to understand the underlying...
  15. Mike Mike

    What are the limits of prescriptive design?

    lex I agree Minnesota code should propagate upwards. Perhaps the reason it can't propagate is someone doesn't want to pay for beefier connections? Perhaps someone would prefer to come back and fix your basement wall after it fails than prevent it from failing in the first place? maybe 4 out of...
  16. Mike Mike

    Do these deck beams look stable to you?

    lex, referring to your issue #2: in lieu of hanging dropped beams from full height posts, would you be ok with simply specifying beefy caps as phameng and I suggested above? in lieu of beefy caps or anything at all to stabilize the beam-post interface, would you be ok with simply accounting for...
  17. Mike Mike

    Do these deck beams look stable to you?

    Thanks all, great to hear I'm not crazy. I agree there are potentially global lateral load path issues, post slenderness issues, and joist stability issues. But I'm focusing on the beams because this issue is the most common. It occurs on more than half my decks. Also this is the one issue I...
  18. Mike Mike

    Do these deck beams look stable to you?

    Do the dropped beams in the photos below follow the intent of the code? This seems to be industry standard deck construction, and there is pressure from contractors to go along, but I'm not a fan for 2 reasons: 1. The bottom of the beam is in compression where continuous over posts and wants to...
  19. Mike Mike

    What are the limits of prescriptive design?

    One more inconsistency I noticed when I was doing my nightly IRC reading: Am I looking at something wrong, or does the IRC table below prescriptively specify 7/16" floor sheathing for supports at 24" oc? Why doesn't it match APA E30, also below? I mean the IRC is probably not wrong, 7/16"...
  20. Mike Mike

    What are the limits of prescriptive design?

    lex, were you sipping the sauce too that night? what a delightful ramble. I agree your comments would be great for submission to Stephanie J. Young, P.E. Chair of the NCSEA Code Advisory IRC Working Group. She said she needs our help in the article you linked. Here's a summary of our comments so...

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